Had a family member booked on a domestic JNB-CPT via a BA Avios redemption in Club next week. This was showing cancelled (unsurprisingly). BA were able to rebook on another airline without penalty and without any charge for this redemption flight, all seemed easy. The flight that best matched the required timings was an Airlink flight, not sure if other rebooking options are available. Rebooking was also in business. Did the change by phone.